Profiling Node.JS (code) execution time in Linux
-
21-07-2021 - |
Question
I am looking for a method to do precise Node.JS
profiling of script execution times on Linux.
There are interesting projects like the NodeTime.com Performance Profiler, but this profiles the timing of I/O httprequests and such, not execution time of lines of code.
I am looking for a way to figure out exactly where I can optimize my Javascript, where most of the time is spent, etc.
One interesting method I've seen is trying to create a FlameGraph using DTrace to profile Node.JS.
However, dtrace
is very Solaris-specific.
- For Linux (Debian/Ubuntu),
dtrace
can be found in thesytemtap-sdt-dev
package. However,stap dtrace
is not the same, and lacks all relevant hooks/probes. - Paul Fox made a port from the Unix version. It's more feature complete but somehow the hooks/probes don't work in userspace as the Solaris one, and also cannot be used to profile node.
ftp://crisp.dyndns-server.com/pub/release/website/dtrace/ (It's pretty easy to build, see README.) - There's also an
Oracle
port, but noone would recommend it. Apparently, it only has about 0,1 percent of the probes the Paul Fox port. (Which is ironic, becauseOracle
was formerlySun
, original authors ofdtrace
forSolaris
)
How, in Linux, using the terminal or using Eclipse, can I profile the code of my Node.JS scripts? I'm looking for something specific like the Zend Profiler shows execution times of each command in code of PHP scripts.
Solution
If you're not against using nodetime, it actually does have CPU profiling:
See: http://nodetime.com/blog/cpu-profiling-with-nodetime
OTHER TIPS
"look" is a very good tool made by Vadim for profiling NodeJS app.
Take a look here:
https://www.npmjs.org/package/node.profiler Exactly what you need... It runs your project in monitor mode and it generates a chart after you are done with details on functions, each how many times it was called and the time it spent there.